public function prepareRow(Row $row) {
// Remove field_ prefix for new bundle.
$bundle = $row
->getSourceProperty('field_name');
$bundle = substr($bundle, FieldCollection::FIELD_COLLECTION_PREFIX_LENGTH);
$row
->setSourceProperty('bundle', $bundle);
// Get Field API field values.
$field_names = array_keys($this
->getFields('field_collection_item', $row
->getSourceProperty('field_name')));
$item_id = $row
->getSourceProperty('item_id');
$revision_id = $row
->getSourceProperty('revision_id');
foreach ($field_names as $field_name) {
$value = $this
->getFieldValues('field_collection_item', $field_name, $item_id, $revision_id);
$row
->setSourceProperty($field_name, $value);
}
return parent::prepareRow($row);
}